diff --git a/README.md b/README.md
index 85d2ae3..e36483d 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,11 @@
-# mail_archive
+# Email archive script #
 
-Script to archive emails from one imap account to another.
-Intended to be able to add other backends
\ No newline at end of file
+
+## Goal ##
+
+The goal is to provide a script able to connect to a `source` email, account, retrieve all old
+email (definition of old coming from configuration and either move it to an archive folder on
+another account or delete it.
+
+First version will only know of an imap email backend, but architecture should allow to add
+other email backends (eg. EWS or a local Maildir)
diff --git a/template_conf.yml b/template_conf.yml
new file mode 100644
index 0000000..f05e0c1
--- /dev/null
+++ b/template_conf.yml
@@ -0,0 +1,108 @@
+##
+# Source of mail to be archived
+#
+# type: type of email storage, only supported format is imap. Following
+# attributes are those of an imap account,  could be different for other storage types.
+#
+# server : address of imap server
+# port : port if not default (default is 993 if tls_mode = direct, else 143)
+# tls_mode : none : no tls at all (should be reserved to debug)
+#            direct : direct TLS as in imaps
+#            starttls : normal connect then starttls command, fails if starttls
+#                       not present in server capability
+#            try : as starttls, but does not fail is starttls not present in
+#                  capability, and falls back to clear text connection if
+#                  starttls not present. If STARTTLS is present in capability,
+#                  and TLS negociation fails, connection fails.
+# username : login name to use for connection
+# password : password to use for connection
+#            
+src:
+  type: imap
+  server: mail.mydomain
+  ssl_mode: direct
+  username: mylogin
+  password: mypassword
+# port: 993
+
+##
+# destination account : defined same way as source, account, if is exactly the
+# same account can be defined as src
+#
+# dst: src
+dst:
+  type: imap
+  server: archive.server
+  ssl_mode: try
+  username: archivelogin
+  password: archivepassword
+
+##
+# General options for archiving
+options:
+  # Top level folder for archives (all archives will go under this folder on dst
+  # server), default is INBOX
+  archive_folder: Archives
+  #
+  # time_folders: either yearly or monthly, if not defined archives will not
+  # have separated subfolders pear year or mont
+  time_folders: yearly
+  #
+  # In the archive, keep the original folder tree or not, (default yes)
+  keep_hierarchy : yes
+  #
+  # Do we archive unsubscribed folders
+  archive_unsubscribed : no
+  #
+  # Do we subscribe newly created folders in Archives ?
+  subscribe_new_folders: yes
+
+##
+# rules 
+#
+# rules is a list of rules names with actions and paramaters attached to the
+# name. A folder name matrches a rule name if the rule name is part of the
+# hierarchy leading to the folder name, with '.' as a separator.
+# eg with the following rules, folder lists.debian will have the first rule
+# applied, folder lists.freebsd will have second rule applied.
+# folder lists-temp will not match any rule and thus will have the default rule
+# applied
+# First matching rule is applied
+#
+# action can be keep, clean
+# keep has no additional parameters, it means mails in folder matching the rule
+# are not archived
+# clean and archive have parameters :
+#  age : act on mails older than this number of days
+#  unread : if yes, act on unread emails (default no)
+#  marked : if yes, act on marked emails (default no)
+#
+# clean action means that the matching emails are deleted
+#
+# archive action means that the matching emails are moved to the dst account.
+#
+rules :
+  - lists.debian:
+      action: archive
+      age: 180
+      unread: yes
+      marked: yes
+
+  - lists:
+      action: keep
+
+  - spam:
+      action: clean
+      age: 14
+      unread: yes
+      marked: no
+
+#
+# rule to apply when no rule matches.
+# default to a keep rule
+default_rule:
+    action: archive
+    age: 90
+
+
+